Since anyone with a penis is a potential rapist there is only but one (or two) answers: [View all]

All male children should be aborted upon learning of the sex.

Genocide of the male sex.

Very tongue and cheek but I wrote a short story back in the seventies in which men were driven out of a matriarchal society due to similar reasons and then hunted and brought in for breeding purposes as the male children were culled and the male population kept in check and fear.